Thanks for the query.
You better get investigated to find out the possible cause for your problem like poly cystic ovary disease, thyroid
abnormality etc. and take tablets accordingly.
And maintain ideal weight for the height.
After that you have to stop your contraceptive
pills before planning for pregnancy
Then you have to track your ovulation with ovulation kit and plan unprotected intercourse
around that period, which will icrease the possibility of the pregnancy.